Name: Extensor Digiti Minimi
Action: Extends any of the joints of the little finger.
Innervation: Posterior interosseous nerve, C7 (primary) and C8.
Note: This site, along with other muscles of the distal extremities, has been found to be optimal for tceMEPs. Additional muscle groups may be monitored to provide added information, but the data is generally considered to be less reliable.